申请人:Rhone-Poulenc Industries
公开号:US04029781A1
公开(公告)日:1977-06-14
New cephalosporin compounds of the formula: ##STR1## in which A is oxygen or sulphur, R.sub.1 is hydrogen or acetoxy and R.sub.2 is carboxy or a radical of the formula: ##STR2## in which the radical ##STR3## is a radical which can be easily removed enzymatically, and in which R.sub.3 is hydrogen or straight or branched chain C.sub.1-4 alkyl and R.sub.4 is straight or branched chain C.sub.1-4, alkyl or cyclohexyl, together with its diastereoisomeric forms and mixtures thereof, its acid addition salts and, where appropriate, its pharmaceutically acceptable non-toxic metal salts and addition salts with nitrogen-containing bases other than ammonia, exhibit valuable anti-bacterial properties, in particular against Gram-positive and Gram-negative bacteria.
新头孢菌素化合物的化学式:##STR1## 其中A是氧或硫,R.sub.1是氢或乙酰氧基,R.sub.2是羧基或化学式的基团:##STR2## 其中基团##STR3## 是一种容易通过酶去除的基团,且R.sub.3是氢或直链或支链C.sub.1-4烷基,R.sub.4是直链或支链C.sub.1-4烷基或环己基,以及其对映异构体形式和混合物,其酸加合物盐以及必要时的药用可接受的非毒性金属盐和与氮含基的碱形成的加合盐,展现出有价值的抗细菌特性,特别是对革兰氏阳性和革兰氏阴性细菌。